729142 has 4 divisors (see below), whose sum is σ = 1093716. Its totient is φ = 364570.

The previous prime is 729139. The next prime is 729143. The reversal of 729142 is 241927.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182284 + ... + 182287.

It is an arithmetic number, because the mean of its divisors is an integer number (273429).

2⁷²⁹¹⁴² is an apocalyptic number.

729142 is a deficient number, since it is larger than the sum of its proper divisors (364574).

729142 is a wasteful number, since it uses less digits than its factorization.

729142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364573.

The product of its digits is 1008, while the sum is 25.

The square root of 729142 is about 853.8981203867. The cubic root of 729142 is about 90.0058432420.

The spelling of 729142 in words is "seven hundred twenty-nine thousand, one hundred forty-two".